<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul
          class="cart-list"
          v-for="(cart, index) in cartInfoList"
          :key="cart.id"
          @change="changeChecked(cart, $event)"
        >
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked == 1"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">{{ cart.skuName }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.skuPrice }}.00</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="handler('minus', -1, cart)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              :value="cart.skuNum"
              minnum="1"
              class="itxt"
              @change="handler('change', $event.target.value * 1, cart)"
            />

            <a class="plus" @click="handler('add', 1, cart)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.skuNum * cart.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a class="sindelet" @click="deleteCart(cart)">删除</a>
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" :checked="isAllCheck&&cartInfoList.length!=0" @click="CheckedAll"/>
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="deleteAllChecked">删除选中的商品</a>
        <a>移到我的关注</a>
        <a>清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择 <span>0</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalprice }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" @click="$router.push('/trade')">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapGetters } from "vuex";
import throttle from "lodash/throttle"; //节流
export default {
  name: "Shopcart",
  mounted() {
    this.getDate();
  },
  methods: {
    getDate() {
      this.$store.dispatch("getCartList");
    },
    //修改产品数量
    handler: throttle(async function (type, disNum, cart) {
      //type:为了区分这三个元素
      //disNum形参:+变化量（1） -变化量（-1）input最终个数（并不是变化量）
      //cart：点击的是哪一个产品
      //向服务器发送请求
      switch (type) {
        case "add":
          disNum = 1;
          break;
        case "minus":
          disNum = cart.skuNum > 1 ? -1 : 0;
          break;
        case "change":
          //当用户输入量为非数字类型，给服务器带0
          if (isNaN(disNum) || disNum < 1) {
            disNum = 0;
          } else {
            disNum = parseInt(disNum) - cart.skuNum;
          }
          break;
      }
      //派发active
      try {
        //代表修改成功
        await this.$store.dispatch("addShopcart", {
          skuId: cart.skuId,
          skuNum: disNum,
        });
        //再一次获取服务器最新展示
        this.getDate();
      } catch (error) {}
    }, 1000),
    //删除商品
    deleteCart: throttle(async function (cart) {
      //节流防止用户操作过快，产生负数
      try {
        //如果删除成功再次发请求获取删除后的购物车数据展示
        await this.$store.dispatch("deleteCart", cart.skuId);
        this.getDate();
      } catch (error) {}
    }, 1000),
    //修改产品的勾选状态
    async changeChecked(cart,event) {
      try {
        //给服务器的参数不是布尔值  是0或1
        let isChecked = event.target.checked? "1" : "0";
        await this.$store.dispatch("UpdateCheckedByid", {
          skuId: cart.skuId,
          isChecked,
        });
        //如果修改成功再次获取服务器数据（购物车）
        this.getDate();
      } catch (error) {
        //如果失败提示
        alert(error.message);
      }
    },
    //删除选中的商品
    //这个回调函数咱们没办法收集到一些有用的数据
    async deleteAllChecked() {
      try {
        //派发action
        await this.$store.dispatch("delteAllCheckedCart");
        //再发请求获取购物车列 表
        this.getDate();
      } catch (error) {
        alert(error.message);
      }
    },
    //全选
    async CheckedAll(event){
     
      /* this.cartInfoList.forEach(item=>{
        this.$store.dispatch('UpdateCheckedByid',{
          skuId:item.skuId,
          isChecked:checked
        })
      })
      this.getDate() */
      try {
        let isChecked=event.target.checked?'1':'0'
        await this.$store.dispatch('updateAllchecked',isChecked)
        this.getDate();
      } catch (error) {
         console.log(error.message);
      }
      
    },
    //提交订单
    toTrade(){
      this.$router.push('/trade')
    }
  },
  computed: {
    ...mapGetters(["cartList"]),
    cartInfoList() {
      return this.cartList.cartInfoList || [];
    },
    //总价
    totalprice() {
      let sum = 0;
      this.cartInfoList.forEach((item) => {
        sum += item.skuPrice * item.skuNum;
      });
      return sum;
    },
    //全选
    isAllCheck() {
      //every循环  只要循环有一个不符合就返回false
      return this.cartInfoList.every((item) => item.isChecked == 1);
    },
  },
};
</script>

<style scoped lang="less">
.cart {
  width: 1200px;
  margin: 0 auto;
  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }
  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;
      & > div {
        float: left;
      }
      .cart-th1 {
        width: 25%;
        input {
          vertical-align: middle;
        }
        span {
          vertical-align: middle;
        }
      }
      .cart-th2 {
        width: 25%;
      }
      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }
    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;
      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;
        & > li {
          float: left;
        }
        .cart-list-con1 {
          width: 15%;
        }
        .cart-list-con2 {
          width: 35%;
          img {
            width: 82px;
            height: 82px;
            float: left;
          }
          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }
        .cart-list-con4 {
          width: 10%;
        }
        .cart-list-con5 {
          width: 17%;
          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }
          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }
        .cart-list-con6 {
          width: 10%;
          .sum {
            font-size: 16px;
          }
        }
        .cart-list-con7 {
          width: 13%;
          a {
            color: #666;
          }
        }
      }
    }
  }
  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;
    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;
      span {
        vertical-align: middle;
      }
      input {
        vertical-align: middle;
      }
    }
    .option {
      padding: 10px;
      overflow: hidden;
      float: left;
      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }
    .money-box {
      float: right;
      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }
      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;
        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }
      .sumbtn {
        float: right;
        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>